Add health check endpoint (#8048)

tests/rest/test_health.py

@@ -0,0 +1,34 @@
+# -*- coding: utf-8 -*-
+# Copyright 2020 The Matrix.org Foundation C.I.C.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
+from synapse.rest.health import HealthResource
+
+from tests import unittest
+
+
+class HealthCheckTests(unittest.HomeserverTestCase):
+    def setUp(self):
+        super().setUp()
+
+        # replace the JsonResource with a HealthResource.
+        self.resource = HealthResource()
+
+    def test_health(self):
+        request, channel = self.make_request("GET", "/health", shorthand=False)
+        self.render(request)
+
+        self.assertEqual(request.code, 200)
+        self.assertEqual(channel.result["body"], b"OK")